SAS-1.1 : Expander limit shown in SAS Domain class diagram

Fore, Chris Chris_Fore at adaptec.com
Fri Jul 29 06:16:05 PDT 2005


* From the T10 Reflector (t10 at t10.org), posted by:
* "Fore, Chris" <Chris_Fore at adaptec.com>
*
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Figure 10 of section 4.1.1 of SAS-1.1 (Revision 9e) appears to indicate
that the Service delivery subsystem contained by a single SAS domain =
may
contain up to 127 Expander devices. =20

=20

Figures 25, 26, and 27 of section 4.1.8.3 appear to contradict that
upper limit by showing a examples of a single SAS domain containing =
more
than a single edge expander device set.=20

=20

Is Figure 10 correct?=20

=20

:: R. Chris Fore

:: Principal Engineer - Storage Systems Architecture=20

:: Adaptec, Research Triangle Park, NC=20

:: (919) 287-2024=20

=20


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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Figure 10 of section 4.1.1 of SAS-1.1 (Revision 9e) =
appears
to indicate that the Service delivery subsystem contained by a single =
SAS
domain may contain up to 127 Expander devices.&nbsp; =
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Figures 25, 26, and 27 of section 4.1.8.3 appear to
contradict that upper limit by showing a examples of a single SAS =
domain containing
more than a single edge expander device set. =
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Is Figure 10 correct? <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>:: R. <st1:PersonName =
w:st=3D"on">Chris Fore</st1:PersonName><o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>:: Principal Engineer - Storage =
Systems
Architecture </span></font><o:p></o:p></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>:: Adaptec, <st1:place =
w:st=3D"on"><st1:City
 w:st=3D"on">Research Triangle Park</st1:City>, <st1:State =
w:st=3D"on">NC</st1:State></st1:place>
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>:: (919) 287-2024 =
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

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